Pathology in Ontario, OR

5 active Pathology providers practice in Ontario, Oregon according to the latest NPPES snapshot. Profiles include the NPI number, taxonomy code, license state, and practice address.

Pathology providers in Ontario, OR
NPI	Name	Type	Specialty	Location
1659319549	Eric Rysenga	Individual	Anatomic Pathology & Clinical Pathology Physician	Ontario, OR
1720025117	Kathleen Harms	Individual	Anatomic Pathology & Clinical Pathology Physician	Ontario, OR
1821028689	Ontario Pathology Group, LLP	Organization	Anatomic Pathology & Clinical Pathology Physician	Ontario, OR
1376586941	William Thompson	Individual	Anatomic Pathology & Clinical Pathology Physician	Ontario, OR

Frequently asked questions

How many Pathology providers are in Ontario, OR?

The latest NPPES snapshot lists 5 active Pathology providers with a practice address in Ontario, Oregon.

How do I check a Pathology provider's NPI in Ontario?

Open a profile below to see the NPI number, taxonomy code, and practice address, then verify against the official NPPES registry — every profile links directly to the CMS record.

Source: CMS NPPES (public data). Snapshot 2026-07-10.